There's a Real, Scientific Reason We Love Oral Sex

​Let's take it back to basics.

Why do we engage in oral sex? As foreplay, or because we genuinely like it?

Well, according to a recent study, it looks like there is a lot more science behind why we love oral sex than simply moving from third base to fourth base. We all know why we have an innate need to have penetrative sex—the evolutionary purpose of reproduction. But oral sex is slightly different, according to the Journal of Reproductive Immunology.

Apparently, the reason women like to give oral sex is because swallowing a man's semen can help a woman's body become accustomed to his DNA. This, in turn, helps the woman during pregnancy because her body will not see the fertilised semen as "foreign," which could lead to pregnancy disorders.

As to why men like to give oral sex, the findings revealed a seemingly shallower intention: to stop the woman from cheating. Yes, the study suggests that the more oral sex a woman received, the less likely she is to cheat.